21150320

素因数分解:

$2^4\times 5^1\times {\mathrm{59}}^1\times {\mathrm{4481}}^1$

素因数の和:4553

約数の個数: 40

約数和(自身を含む): 50019120

約数和(自身を除く): 28868800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 59, 80, 118, 236, 295, 472, 590, 944, 1180, 2360, 4481, 4720, 8962, 17924, 22405, 35848, 44810, 71696, 89620, 179240, 264379, 358480, 528758, 1057516, 1321895, 2115032, 2643790, 4230064, 5287580, 10575160, 21150320]

約数ペア:

[(1, 21150320), (2, 10575160), (4, 5287580), (5, 4230064), (8, 2643790), (10, 2115032), (16, 1321895), (20, 1057516), (40, 528758), (59, 358480), (80, 264379), (118, 179240), (236, 89620), (295, 71696), (472, 44810), (590, 35848), (944, 22405), (1180, 17924), (2360, 8962), (4481, 4720)]